document.getElementsByTagName('link')[1].disabled = true;

function changeCSS(id)
{
	if(id == 1){
		document.getElementsByTagName('link')[1].disabled = false;
		document.getElementsByTagName('link')[0].disabled = true;
		document.getElementById('A+').style.display = "none";
		document.getElementById('A-').style.display = "inline";
	}else{
		document.getElementsByTagName('link')[1].disabled = true;
		document.getElementsByTagName('link')[0].disabled = false;
		document.getElementById('A+').style.display = "inline";
		document.getElementById('A-').style.display = "none";
	}
}